11. 21g
12. ?
13. X=1.35
14. X>-1
(I'm not sure about 12 because I don't have any paper to solve it at the moment. Sorry! Hope this helps anyway!)
Answer:
4=4
Step-by-step explanation:
<h3>
Answer: Approximately 25.12 meters</h3>
This value is approximate because pi = 3.14 is approximate
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Work Shown:
r = 4 = radius
pi = 3.14 approximately
C = circumference
C = 2*pi*r
C = 2*3.14*4
C = 25.12
The circumference is approximately 25.12 meters.
Side note: The circumference is the same as the perimeter of a circle.
12 out of 24 is 1/2
1/2 of 400 is 200, so the answer is 200 students.
